feat: Add ImplementationGuides compile method

[carvantes]

Description of changes:

Mostly just refactoring the old .js compiler script into .ts to use it as the implementation of the ImplementationGuides interface compile method. The functionality of the compiler remains unchanged.

We are still bundling the FHIR R4 resources into the search package, so we retain scripts/searchParamsCompiler/run.ts as a convenient way to regenerate our schema files if we make changes the grammar/compiler.

Testing:
re-compiled the search params for fhir 4.0.1 and 3.0.1. There were no changes to the output, as expected.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[nguyen102]

Looks good, one nitpick about type definition for UNSUPPORTED_SEARCH_PARAMS. Also remember to update the version of the interface package. Looks like GH action Unit Tests and Linting threw an error for it.

[nguyen102]

Should this be initialized as an array of string?

const UNSUPPORTED_SEARCH_PARAMS: string[]

[carvantes]

Doing so won't change the "initialization" of the variable. The difference would be declaring the type explicitly instead of letting TS infer it.

In many cases declaring types explicitly makes code more readable, but declaring types explicitly all the time can be overly verbose and is sort of a waste of the type inference capabilities of TS.

IMO here it's obvious that it is an array of strings since it's a small, fixed, array declared on that same line.